There are marriage records of the two daughters that show parents as William Thorn and Eliza Desmond, but I did not find a marriage record for the parents.
Frederick P. Moss 30y married Charlotte Thorn 20y on 4 Dec 1900 at Richards Landing, Algoma, Ontario Canada. Her father is William Thorn and mother is Eliza Desmond.
Wilfred Burns 41y, married Francis 26y, 25 Apr 1909 at St. Ignace, Mackinac, MI. Her parents listed as William Thorne and Eliza Desmond.
William Thorne and Eliza Desmond had a third child, Warren Frederick Thorn, 17 Nov 1897 at Jocelyn, Algoma East, Ontario, Canada .